Collinsville, IL

View of Collinsville, IL
Image credit: Paul Sableman / CC BY 2.0
Population
23,717
U.S. Census Population Estimates Program · 2025
Elevation
564 ft
Median Home Value
$163,600
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$1,038/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$67,612
U.S. Census American Community Survey 5-Year · 2024

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Collinsville in context.

About Collinsville

Collinsville is a Metro East city best known for two very different landmarks: Cahokia Mounds and the Brooks Catsup Bottle water tower. Cahokia Mounds State Historic Site preserves the largest pre-Columbian settlement north of Mexico, created by the Mississippian culture, while the giant catsup bottle gives the city a playful roadside icon. Collinsville also celebrates that connection with an annual festival. The city feels like a St. Louis-area working suburb with unusually deep Indigenous history and a memorable dose of Americana.

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